I had a load calculation do be exalcalde plus and there were many issues with their calculation. First 5 large glass sliding doors where not included in the analysis, each glass door is 42 inches wide by 90 inches tall.second they put down that we had no shades or curtain on other windows which in fact all windows have shades and curtains. Third the tonnage for ac was put at 3.4 tons which is defiantly too low for a house that is 2444sq ft. I do not trust this company as I feel they are using figures from other homes that they have completed. I would not recommend this company for an honest home ac calculation.